Biogas (methane and carbon dioxide) generated duringthe anaerobic process passed through a solution 3 M NaOHfor capturing the CO2present in the biogas to Na2CO3, thenmethane gas was measured by displacement of water in a col-umn; methyl orange was used as indicator of the saturationof NaOH solution. During the batch experiments, the volumeof methane was measured as a function of time; samples of wastewater were taken for analysis of pH, alkalinity, COD, TSS,turbidity and color, every 48 h.